A fisherman rows 20 km downstream in 2 hours and 15 km upstream in 3 hours. Find the net speed of the boat in still water. MCQ with Answer and Explanation

A bus moving at 42 km/h covers a distance in 8 hours. At what speed must it travel to cover the same distance in 6 hours?

A car covers a certain distance at an average speed of 48 km/h in 5 hours. At what speed must it travel to cover the same distance in 4 hours?

The speed index tracking profile of an express locomotive is exactly 20% higher than a commercial car. Both take off from terminal M together and reach terminal N, 120 km away, at the same instant. On the corridor route, the train logs a total stall of 10 minutes at intermediate stations. Find the car speed.